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Molecule Parameter List for PDE1 | The statistics table lists the distribution of a molecule acting either as a substrate, product, enzyme or as a molecule within the network.
The text color of a molecule is highlighted by  color. | | Statistics |
Accession and Pathway Details | |
| Accession Name | Accession No. | Accession Type | Pathway Link | | CaMKII_model3 | 63 | Network |
Shared_Object_CaMKII_model3, CaMKII, CaM,
PP1, PP2B, PP1_PSD,
AC, PKA | | This is the complete model of CaMKII bistability, model 3. It exhibits bistability in CaMKII activation due to autophosphorylation at the PSD and local saturation of PP1. This version of model 3 includes PKA regulatory input. This has little effect on the deterministic calculations, but the PKA pathway introduces a lot of noise which causes a difference in stochastic runs. |
PDE1 acting as a Molecule in CaMKII_model3 Network
| Name | Accession Name | Pathway Name | Initial Conc.
(uM) | Volume
(fL) | Buffered | | PDE1 | CaMKII_model3
Accession No. : 63 | AC
Pathway No. : 269 | 2.5926 | 0.09 | No | | CaM-Dependent PDE. Amount calculated from total rate in brain vs. specific rate. |
PDE1 acting as an Enzyme in CaMKII_model3 Network
Enzyme Molecule /
Enzyme Activity | Accession Name | Pathway Name | Km (uM) | kcat (s^-1) | Ratio | Enzyme Type | Reagents | PDE1 /
PDE1
| CaMKII_model3
Accession No. : 63 | AC
Pathway No. : 269 | 39.6999 | 1.667 | 4.0012 | explicit E-S complex | Substrate
cAMP
Product
AMP
| | Rate is 1/6 of the CaM stim form. We'll just reduce all lf k1, k2, k3 so that the Vmax goes down 1/6. |
PDE1 acting as a Substrate in a reaction in CaMKII_model3 Network
| Kd is calculated only for second order reactions, like nA+nB <->nC or nA<->nC+nD, where n is number and A,B,C,D are molecules, where as for first order reactions Keq is calculated.
Kd for higher order reaction are not consider. |
| Name | Accession Name | Pathway Name | Kf | Kb | Kd | tau | Reagents | | CaM_bind_PDE1 | CaMKII_model3
Accession No. : 63 | AC
Pathway No. : 269 | 719.982
(uM^-1 s^-1) | 5
(s^-1) | Kd(bf) = 0.0069(uM) | - | Substrate
CaM-Ca4
PDE1
Product
CaM.PDE1
| | For olf epi PDE1, affinity is 7 nM. Assume same for brain. Reaction should be pretty fast. Assume kb = 5/sec. Then kf = 5 / (0.007 * 6e5) = 1.2e-3 |
| Database compilation and code copyright (C) 2022, Upinder S. Bhalla and NCBS/TIFR
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